I heard a rumor that there was a re-call on the earlier ap1's for cincros in the tranny. Does anyone know if this is true or not, and what the details are on it, if it is true?

 

Unaware of any recall for synchros. Cincro de Mayo?
https://www.s2ki.com/forums/index.php?showforum=145

 

I had the same issues, only after my tranny got hot and only if I shit pass 6k rpm. I replaced my AP1 with another used AP1 tranny. It doesn't happen as often, actually It's probably ony happened 6 times. I have recently tracked it and my instructor did notice a grind, but I did not.

 

Try some GM Cinceromesh Tranny Fluid

 

touche...

 

yes try some GM Synchromesh *Friction Modified*..it will help you shift alot smoother than before..better than the honda mtf..peace

 

does anyone know if lucas oils makes a similar product. i hate GM, i would prefer not to use their oil but if i have to...

 

I had a "grinding/notchy" feeling before I tried the GM SynchroMesh FM. Shifting is alot smoother now.

 

Where can i purchase the GM Synchromesh at? I seem to be having the same issue

 

Use Redline MTL tranny fluid, skip that GM stuff.